Add module-unloading capabilities to ltt-disarmall

[ltt-control.git] / lttctl / ltt-disarmall.sh

diff --git a/lttctl/ltt-disarmall.sh b/lttctl/ltt-disarmall.sh
index d06950f37bbc2685cc0c2298f79a648e723fee68..d60a54eee50cd45546e269d8dd4b00f56b4743bd 100755 (executable)
--- a/lttctl/ltt-disarmall.sh
+++ b/lttctl/ltt-disarmall.sh
@@ -1,21 +1,77 @@
-DEBUGFSROOT=$(grep ^debugfs /proc/mounts | head -1 | awk '{print $2}')
+# Copyright (C) 2009 Benjamin Poirier
+# Copyright (C) 2010 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+DEBUGFSROOT=$(awk '{if ($3 == "debugfs") print $2}' /proc/mounts | head -n 1)
 MARKERSROOT=${DEBUGFSROOT}/ltt/markers
+DEFAULTMODULES="ltt-trace-control ltt-marker-control ltt-kprobes ltt-userspace-event ltt-statedump ipc-trace kernel-trace mm-trace net-trace fs-trace jbd2-trace syscall-trace trap-trace block-trace rcu-trace ltt-relay ltt-tracer"
+EXTRAMODULES="lockdep-trace net-extended-trace"
+
+usage () {
+       echo "Usage: $0 [OPTION]..." > /dev/stderr
+       echo "Disconnect lttng markers" > /dev/stderr
+       echo "" > /dev/stderr
+       echo "Options:" > /dev/stderr
+       printf "\t-q           Quiet mode, suppress output\n" > /dev/stderr
+       printf "\t-h           Print this help\n" > /dev/stderr
+       echo "" > /dev/stderr
+}
+
+if [ "$(id -u)" != "0" ]; then
+       echo "Error: This script needs to be run as root." > /dev/stderr
+       exit 1;
+fi
+
+if [ ! "${DEBUGFSROOT}" ]; then
+       echo "Error: debugfs not mounted" > /dev/stderr
+       exit 1;
+fi
 
-echo Disconnecting all markers
-
-for c in ${MARKERSROOT}/*; do
-       case ${c} in
-       ${MARKERSROOT}/metadata)
-               ;;
-       ${MARKERSROOT}/locking)
-               ;;
-       ${MARKERSROOT}/lockdep)
-               ;;
-       *)
-               for m in ${c}/*; do
-                       echo Disconnecting ${m}
-                       echo 0 > ${m}/enable
-               done
-               ;;
+if [ ! -d "${MARKERSROOT}" ]; then
+       echo "Error: LTT trace controller not found (did you compile and load LTTng?)" > /dev/stderr
+       exit 1;
+fi
+
+while getopts "qh" options; do
+       case ${options} in
+               q) QUIET="0";;
+               h) usage;
+                       exit 0;;
+               \?) usage;
+                       exit 1;;
        esac
 done
+shift $((${OPTIND} - 1))
+
+(eval "find '${MARKERSROOT}' -name metadata -prune -o -name enable -print") | while read -r marker; do
+       grep "^1$" "${marker}" -q
+       if [ $? -ne 0 ]; then
+               continue
+       fi
+       if [ ! ${QUIET} ]; then
+               echo "Disconnecting ${marker%/enable}"
+       fi
+       echo 0 > ${marker}
+done
+
+#Unload the kernel modules
+for i in ${EXTRAMODULES}; do
+       rmmod $i 2> /dev/null
+done
+for i in ${DEFAULTMODULES}; do
+       rmmod $i
+done
+